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나영,이성백,Na, Young,Lee, Seong-Baeg 한국지하수토양환경학회 2001 지하수토양환경 Vol.5 No.3
새만금 간척으로 인해 변화된 조류흐름이 갯벌의 조성에 미치는 영향을 조사하였으며, 이에 따른 물리적 특성이 중금속의 오염도에 미치는 영향을 분석하였다. 또한 회분실험을 통하여 중금속의 종류와 농도 변화에 따른 흡착특성을 알아보고, 흡착등온식을 적용시켰다. 분석결과에 따르면, 해류의 흐름변화로 강 하구 부분에 퇴적현상이 일어나고 있었으며, 이 현상은 중금속의 함량에 영향을 미치고 있었다. 특히 입도 분포와 유기물 함량 그리고 양이온 치환능력의 영향이 크게 작용하고 있음을 알 수 있었다. 중금속 흡착능력은 30분 이내에 주입농도의 90%이상이 흡착되는 것으로 나타났다. 그러므로 새만금의 흐름 양상은 토양 입도를 변화시킬 것이며, 역시 중금속의 흡착능력의 변화가 일어날 것이다. The study was performed to examine the influence of sea tide on a tideland composition by Saemankeum reclamation and to evaluate a correlation between the characteristics of physical and the pollution level of heavy metals. Also, it was investigated the characteristics of heavy metal adsorption through a batch experiment and applied to adsorption isotherm equations. In the results, the flow of sea tide occurred to accumulation action and had an effect on the content of heavy metals. It suggests that influence factors for the content of heavy metals in the tidal flat be grain size, cation exchange capacity and organic matter content. Adsorption capacity of heavy metals occurs to 90% adsorption rate for injection concentration within 30 minutes. The flow patterns in Saemankeum area will undergo a change for soil size distribution. In result, this soil size changed will effect the adsorption capacity of heavy metals.
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製紙슬럿지 소각재의 燒結處理와 溫度의 相關性에 관한 硏究
김환기,이성백,정흥렬 全北大學校 附設 都市및環境硏究所 1995 都市 및 環境硏究 Vol.10 No.1
Paper and pulps industry is improving with development of paper and publication culture, also disposal of paper sludge and flyash has induced significant factor of development in the paper industry because of shortage in disposal area and inhabitant demonstration. There fore this studies persuit fundamentle database of flyash specification in the physical and chemical analysis for recycling architectural materials, etc. 1. This study investigates production of papersludge and flyash chemicalcomposition, physical and chemical specification ( ignition loss, specific weight, sintering temperture. And density etc.) 2. Especially focuses in the characteristics of the sintering treatment and sintering temperature of flyash. 3. Accomplishes in cut of cost through save energy & reuse of waste materials. Environmentally conservation of our nature has to be carried by ourselves.
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주정폐수의 혐기성 소화처리시와 포기처리시 처리특성에 관한 연구
金煥起,李城白,黃譚勇 全北大學校 附設 都市및環境硏究所 1996 都市 및 環境硏究 Vol.11 No.1
The wastewater of alcohol manufactory plant has very high suspended soild and BOD concentration, acidity, and high temperture. Thus most of the plants drive on anaerobic digestion method of biological treatment because of using a lot of generated methane gas and possible to disinfect pathogenic bacteria in sluge and wastewater. But because of the problem in the concentration of anaerobic treatment water, second treatment is necessary 2-step activated treatment for increasing treatment efficiency. The purpose of this study was performed to know a difference between last 1-step digestion 1-step aeration treatment and 2-step digestion 2-step aeration treatment with retention time in digestion and aerator. The obtained results can be summarized as follows; 1. The concentration characteristic of alchohol production wastewater was analyzed COD 50,000∼80,000㎎/ℓ, BOD 22,000∼41,000㎎/ℓ, SS 20,000∼45,000㎎/ℓ, pH 4.1∼4.2, and 75∼80℃ according to the raw material of alchohol. 2. In case of the anaerobic digestion method of rice-barley wastewater, average COD removal rate of 2-step digestion appeared to 91.9% compared to average COD removal rate 59.3% on 1-step digestion. It is necessary to drive above 20 day of retention time in metane degestor because of increasing organic load causing the decrease of pH and the increase of VFA/COD within aerator. 3. Alcohol wastewater of tapioka is generally much treatment efficiency of 2-step digestion than that of 1-step digestion, but below 2.7㎏-COD/㎥·d of COD bulk load showed the possibility of treatment at 1-step and 2-step digestion method. 4. Amount of gas generation in anaerobic digestion was almost similar at 1-step and 2-step digestion. 5. In the result of aerobic treatment, treatment efficiency of 2-step consecutive aeration was highly about 3% compared to 1-step combined aeration and in the condition of COD 4,000㎎/ℓ, COD load 800㎏ -COD/d, COD volume-load 0.8㎏-COD/㎥·d were difficult two treatment methods both. 6. pH and VFA concentrations are considered as important factors to determine VFA restriction and the harmfulness of fatty acid was seemed to be related to pH. VFA in 1-step digestion appeared strong change with the increase of input wastewater quantity, but 2-step digestion was treated to stable change in output COD 1,230∼2,246㎎/ℓ.
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모래여과에 의한 하수처리 유출수의 인제거 특성에 관한 연구
김환기,이성백,신은섭 全北大學校 附設 都市및環境硏究所 1998 都市 및 環境硏究 Vol.13 No.1
Phosphate remaining in wastewater treatment must be removed for the conservation of water quality in a water system. The concentration of phosphate can be decreased from a physic-chemical method for the discharge water of a sewage disposal plant. In this study, it was performed to examine the adsorptive characteristics of sand filter through batch and column experiments in saturated soil. Batch experiment evaluates the concentration change of phosphate with retention time and column experiment performs to analyze a breakthrough curve for phosphate adsorption. And the batch experiment result of adsorptive equilibrium was fitted for the Langmuir model and the Freundlich model. The results obtained from this study were summarized as follows; 1. In the batch experiment, the adsorptive capacity of PO_4^-3 by sand was below 47% of adsorption rate for retention 24 hours in the range of initial concentration 2.0㎎/ℓ ∼4.6㎎/ℓ. 2. The Langmuir and the Freundlich models on the adsorptive equilibrium were fitted well to both in a good correlation coefficient. 3. In the column experiment, the adsorptive breakthrough curve for input PO_4^-3(15.0㎎/ℓ) occurred to about 30ℓ. And output concentration was almost decided at initial breakthrough curve.
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